P-30 Brake Lockup

RV and bus conversion info since 1996.

Share Your Feedback

PRINT PAGE

RV Classifieds

		1965 Gm 4106 - $28,000
		1977 MCI mc8 - $96,000
		2002 Fleetwood COLEMAN/CARAVAN C-23 - $9,750
		2005 Coachmen Sportscoach Elite 401 TS - $174,000
		2007 Bounder 38V - $149,900
		VIEW ALL
		Search RV Classifieds
		Classifieds Policies
		Benefits for Dealers
		Sell Your RV
		Dealer Signup

Useful Links

RV Community

		Discussion Groups
		RV Articles
		RV FAQs
		RV Classified Ads
		Virtual RV Park
		Shop at our Store
		RV Lifestyle Books
		Rate Your RV
		AllThingsRV.com
		MyRVGuide.com
		RVMechanic.com
		Advertise With Us

BECOME A MEMBER

RV Resources

		e RV Loans
		Sculptures for your RV
		Visit Rio Rancho, NM for Winter
		RV Dealers
		RV Manufacturers
		RV Rentals
		RV Glossary
		RV Types
		RV Ratings

P-30 Brake Lockup

Home > Discussion Forum > Mechanic's Corner - Brakes

email William

reply to message

post new message

search forums

hidden layer

ATTENTION: All Postings that advertise items for sale will be deleted from the Discussion Forum. You may post sale items for free in the Classifieds section. Sign up now.

All Messages in Thread	Author	Date
P-30 Brake Lockup	William	2-18-08
I have a 94 Winnebago Brave on a P-30 chassis. I had a leaking master cylinder that was replaced at a local repair shops. A short time after that the brakes lock completely up. After sitting for a while the brakes released and we took it back to the repair shop. This time they replaced the front calipers. On our next trip the brakes locked up again. The repair shop replaced the new master cylinder and both new calipers. On the next trip we drove approximately 200 mile and the brakes locked up. A Chevy dealer replaced the brake hoses to the calipers, flushed the brake system and flied with new fluid. The brakes worked fine for about 1400 miles and locked up this weekend after driving about 80 miles. Does anybody have any ideas as to what to look for next?
Re: P-30 Brake Lockup	BUBBA THE BUS TECH	2-19-08
Check the pus rod length for the master cylinder. If it happens again pull the entire vacume fitting out of the booster. The brake booster can do this. Good Luck
Re: P-30 Brake Lockup	Jim	5-2-08
Am having the same problem with a 1992 southwind on a P30 frame. I am being told that there is a power assist valve that is probably sticking. I don't know yet if it can be repaired or if it has to be replaced. Apparently when you apply the brakes the valve sticks and will not allow the fluid to flow back to the reservoir fast enough to release the brakes. Over a period of time this pressure bleeds off and the brakes will release until you apply them again. Hope this helps and if anyone knows if this valve can be rebuilt or not please let me know.
Re: P-30 Brake Lockup	mark robertson	5-17-08
I would bet that you have to munch brake fluid in the master cyl when you get the brake fluid hot it expands then it applys the brakes then they get hot the fluid in the clapers starts to expand a nd you know the rest take some fluid out of the master cyl and see what happens.
Re: P-30 Brake Lockup	Danny	6-5-08
I had the same problem with my 82 Fleetwood. Try this, after the brakes lock up, loosen the connection behind the wheel where the rubber brake lind connects to the steel line and let some pressure off.See if that releases the brake, you may have to do this on each wheel, just let the pressure off and see if it releases the brake on that wheel. If it does then the rubber line is coming apart on the inside and acting like a CHECK VALVE. I replaced the rubber lines and have not had a problem.,Good Luck